Spring-contracting device.



N. J. HOAG.

SPRING CONTRACTING DEVICE.

AFPLIGA'MON FILED N0v.6.1913s 1,1 1 3,343. Patented Oct, 13, 19m,

. WED STATES' PATENT OFFICE.-

` .NORMAN .Unions irons, or-sKANEA'rnLEs` NEW vonk' 'sPBrivG- eoNTmCTmo DEVICE V-'Be-tdmown that I, NORMAN JEROME fHoAG, a citizen ofthelnitedStates, residing at; Skaneateles. inthe county of Onondaga andfStatevof )New York,l have invented' certain new and useful Improvements in lii,'Spring-Contractiner Devices` ofuwhieh the `lines as aride extend 'outside-of the. engine- ,\l'lind`ers, andspiral. springs surround the valve Steins for giving the proper tension lo move tl: rif, repairin .2o.l

l fin that-condition,or elselrelniov'ed; so'that' valves for grinding. t. eaning or i@ and in order to ldo so, the' springs must :first be compressed, `andi either held The ohjeet ofthejpresent. 'invention is to i Drovide a 'novcland "simpledevictf which eompressinglhe spring sufficiently 'to allow- -lnziy be inserted beneath the `spring .of ya relie, andfthen manipulated 'for raising :l nd

tlie'valve and itsv stem to he removed.

A farther object is to provide means for locking and holdingY the parts of the device in any desired position for maintainingY the compression of the spring. And `a further object, is to provide a device of the class which will tix-st compress and then hold the spring in the proper position until the valve is restored to its working place.

The various features and parts of the invention will belinderstood from the. detailed description which follows, and hy reference to the accompanying drawing, in which-'- Y Figure .1 is a top plan view of the device. Fig. 2 is a side elevation; 'showing the arms `of the device spread apart for -compressinfr the spring of the valve; also showing the vmeans for locking` Said arms-in the separated position.' Fig. .3 is a similar view; showing the position of the parts of the device before the compressing begins.

- In the drawing, 2 represents a portion of the cylinder of an explosionengine, having a raised portion 3, which is bored ont. at 4 to receive and guide the lower end of the valve s bem 5. The iipper end of the stem 5 supportsl-the'- valve 6, and is heldin place by a top guide 7, which also comprises a part of .shown in Fi(v o l K use'iri'cation efraim raient, I pgtnfgdoit, I Applicationfled November 6, 1913.'. Serial No. 799,628..v

thecylinder 'Fig'. 'shows fthe-.valve 6 seated at 8, and its' vstempassesthrough 'a coil spiing 9l in' the usual' Way. Theilpper A end of spring 9 isseatedin' a cup washer 10, while its lower end 1sA seatedf-in a `similar, washer 11, which v1s `held 1n certainfposrholding tbe spring 9 compressed-to a .certain extent for 'exertmg the proper .tension .onthe .valve o. `Vl'helifval've 6 and its related vparts ltion on the stem by a pid-1 2v which- .pierces the stem, the said--pin'being employed-for are in the working condition, t-l1e'f-pin'12" rests upon the boss 3. In '.order-:to-grelease the valve from the control .of;t 'elspriiig- 9, so that it. may be removedandrgroundgwrepaired or cleaned, itis necessary frstL-tolift and compress the spring,`.so`fthatth may be withdrawiL- after-iwhi l and its-stem;may/beiren' The -present'ffinvention wh ich a llowstheir oppositie ends tdbeino are adapted to st-raddlehth'evalvezstexn 5, when the device is applied for contracting the spring of the valve; The forked jaws-`v 1G and 17 are moved toward or from each other by means of a -handle or lever 18 havingr a fork 1S) which straddles the arm 13 and is pivoted `to said arm by a ,rivet or pin 20.

The extreme end-of the fork 1S) pivotallyconnects to one end of a link .2'1, which is' pivoted to thearm 14 by a rivet on` p1n`22. Under this construction, by 'raising'. the

handle 1S the vjaws 16 and 17areV brought together (seelfig. 3) and bylowering the said handle'` the jaws ,are spread. apart- (see.-

Fig. 2). Tp rehiove the pin -12 for releasing the valve stem from 4the control of the spring 9, the handle 1S is raised, and the closed jaws 16 and 1,7 `are. inserted between the cupwasher 11 and the top of the boss, 3, as shown in Fig. 3. ThehandlelS is then depressed,- Y Y During this operation the i' and the jaws 16 and' 1 7 Aspread apart, as

jaw 17 of the arm 14 remains upon the ledge or boss 3, while th'e'jaw 16 of the arm 13 is Amoved u wardly carrying with it the washer 11 and hereby compressing the spring 9.-

This upward movement of the Washer and spring releases the valve-stein and frees theA trolled by 'gravity' traverses and successively and there is no danger ofthe spring being pin 12 from engagement with the washer 11,

so that the engineer may readily withdraw the said pin by the use of a pair of pliers or other suitable instrument 23,.as shownjn Fig. 2. The valve andV its stem are thus'ire- .leased Aand may be withdrawn from the guides, and repaired, cleaned or ground.

It is a particular object of the present invention to provide a spring contracting de vice which-may be left in the position described during the interval the valve is out of commission, and a further object is-to provide means for locking and holding the jaws 16 and-17 in the extended position for maintaining the compression of the springl l until the valve is restored to its working psition. To thisv end, I'A provide a pawl or latch`24, which is pivoted atv 25 to the arm 13, the lower end 24" of the pawl normally engages the said teeth, and thus prevents the jaws 16 and 17 from accidentally closing under the tension of the spring 9. In this manner-the spring may becornpressed to any' desired extent, and the pawl will hold-the arms extended. By the provision and ar# rangement of the pawl 24, the jaws 16 `and 17 can be spread apart the requisite,distance to enable the engineer to remove the pin 12,

injured or distorted, and the power of the spring is at the same timel employedvforv holdingfthe contracting de vic'e 'in place, as shown in Fig. 2,-until the valve isreturned to'tits working position. -After the valve stem 5 has been inserted-in the guides 4 and 7,-the pin 12 is placed in position again.

on the handle 18 sufficiently to relieve the strain on the pawl. Then by placinghis thumb on the `Aupper end 27, he may swing the pawl from the position shown in Fig. 2 to 'that shown in Fig. 3.- The jaws 16 and 17 will then come together under the power of the spring 9, lasfshown in Fig."3. 'The jaws 16 andv17 .may then be withdrawn, which wilLallow the washer 11 to .approach theboss3.

Having thus described my invention, what I claim as new and'desire tozsecurevby Letters Patent, isf- Y lThe operator should then press downwardly In a deviceof theclass described, a' pair thereof provided with forked jaws,a' handle pivoted to the'topmost arm, a link connect- -ing said handle to the f-lowermost arm, a

pawl carried ,by the` topmostnarm disposed etween the handle. and one end of said arms,` and a seriesof ratchet teeth arranged on the lowermos'tarmfand engagedby said pawl for adjustably holding saidjaws apart, substantially as described. f y l Aof arms hinged at oneend, the opposite ends In testimony' whereofI affixA` signature invpresence'oftwowitnesses .I NORMANJEROMEHOAG.

Witnesses: Y

HARRY' DE WALLACE, f GEORGE DE VVAL'LACE,V4 

